The purpose of any simple machine is to allow a job to be done with less force than would normally be needed. however, when a string of simple machines are added together to accomplish a task, the overall efficiency of the machine decreases. write a brief essay explaining why the efficiency of a complex machine decreases as more simple machines are used. be sure to include a discussion on the conservation of energy in your explanation.

By the law of conservation of energy, the energy input to a system must equal the output. However, when there are more moving parts in a machine, like in a complex machine, the energy converted to non-useful energy, such as the production of heat energy via friction, is increased. Therefore, the more the moving parts, the greater the losses of energy due to increased friction. This is why complex machines are less efficient.   

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